<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
		<script>
			function checkUname(){
				//用户输入
				username=$("#uname").val();
				//验证规则（正则表达式）
		        reg=/^[a-zA-Z0-9]{3,10}$/;
		        if(!reg.test(username)){
		    	$("#uname").css("border-color","red")
		    	return false;
		        }
		        else{
		    	$("#uname").css("border-color","white")
		    	return true;
		        }
			}
			function checkUpsw(){
	    		psw =$("#upsw").val();
	    		reg=/^[0-9]{6}$/;
	    		if(!reg.test(psw)){
	    		$("#upsw").css("border-color","red")
	    		return false;
	    	    }
	    		else{
	    		$("#upsw").css("border-color","black")
	    		return true;
	    	   }
	    		function checkAll(){
	    			checkUname()
	    			checkUpsw();
	    			
	    		}
	    	 }
		</script>
	</head>
	<body>
		<h3>用户名是字母数字的组合，3-10个；密码6个</h3>
		用户名<input type="text" onblur="checkUname()" id="uname"/><br>
	        密码<input type="password" onblur="checkUpsw()" id="upsw"/><br>
	    <button disabled="click="checkAll()">登录</button>
	</body>
</html>
